Modelling and interpretation of CO2 injection within the Ohaaki geothermal reservoir
Author: Makani Joinville
Year: 2023
Supervisors: Juliet Ann Newson
Abstract:
The method of capturing CO2 is dependent on the technology being used and the operating conditions. Methods of storage are similarly variable and are determined by the reservoir conditions and geology. The aim of this thesis is to model and interpret the migration of injected CO2 at the Ohaaki geothermal field, located in New Zealand. The use of TOUGH2, AUTOUGH2 geothermal simulators and TIM will aid in understanding the direction of the migration of CO2 within the reservoir as well as the potential for it to reach the surface after 5,10, 15 and 20 years of injection. A modeling study of tracer injection is also undertaken in order to gain a qualitative idea of how the model behaves with respect to fluid movement between the wells in question.